Готові списки джерел за темами / Graphene-related material

Добірка наукової літератури з теми "Graphene-related material"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Graphene-related material"

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Catania, Federica, Elena Marras, Mauro Giorcelli, Pravin Jagdale, Luca Lavagna, Alberto Tagliaferro, and Mattia Bartoli. "A Review on Recent Advancements of Graphene and Graphene-Related Materials in Biological Applications." Applied Sciences 11, no. 2 (January 10, 2021): 614. http://dx.doi.org/10.3390/app11020614.

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Graphene is the most outstanding material among the new nanostructured carbonaceous species discovered and produced. Graphene’s astonishing properties (i.e., electronic conductivity, mechanical robustness, large surface area) have led to a deep change in the material science field. In this review, after a brief overview of the main characteristics of graphene and related materials, we present an extensive overview of the most recent achievements in biological uses of graphene and related materials.
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Catania, Federica, Elena Marras, Mauro Giorcelli, Pravin Jagdale, Luca Lavagna, Alberto Tagliaferro, and Mattia Bartoli. "A Review on Recent Advancements of Graphene and Graphene-Related Materials in Biological Applications." Applied Sciences 11, no. 2 (January 10, 2021): 614. http://dx.doi.org/10.3390/app11020614.

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Анотація:
Graphene is the most outstanding material among the new nanostructured carbonaceous species discovered and produced. Graphene’s astonishing properties (i.e., electronic conductivity, mechanical robustness, large surface area) have led to a deep change in the material science field. In this review, after a brief overview of the main characteristics of graphene and related materials, we present an extensive overview of the most recent achievements in biological uses of graphene and related materials.
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Sheka, Elena F. "Dirac Material Graphene." REVIEWS ON ADVANCED MATERIALS SCIENCE 53, no. 1 (January 1, 2018): 1–28. http://dx.doi.org/10.1515/rams-2018-0001.

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Abstract The paper presents an overview of graphene electronic structure in light of a general concept of emergent phenomena that result from the quantum phase transition caused by continuous symmetry breaking. In the current case, the spin symmetry breaking is provided by a drastic enhancement of pz odd electron correlation when the shortest distance between them, defined by C=C bond length, exceeds critical value Rcri. The UHF formalism clearly evidences the broken symmetry occurrence and perfectly suits to self-consistent description of the issue. Empirically supported and convincingly certified, the UHF emergents, such as (i) open-shell character of electron spinorbitals; (ii) spin polarization of electron spectrum; (iii) spin contamination; (iv) depriving the spin multiplicity of electronic states; (v) local spin pool at zero total spin density, and so forth greatly extend the view on ground states of graphene and other sp2 nanocarbons and not only give a clear vision of spin peculiarities of graphene chemistry but predicatively point to the occurrence of emergents related to graphene physics, such as ferromagnetism, superconductivity and topological nontriviality. The paper presents numerous experimental evidences supporting a deep interrelationship between emergent chemistry and emergent physics of graphene.
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Woo, Yun. "Transparent Conductive Electrodes Based on Graphene-Related Materials." Micromachines 10, no. 1 (December 26, 2018): 13. http://dx.doi.org/10.3390/mi10010013.

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Transparent conducting electrodes (TCEs) are the most important key component in photovoltaic and display technology. In particular, graphene has been considered as a viable substitute for indium tin oxide (ITO) due to its optical transparency, excellent electrical conductivity, and chemical stability. The outstanding mechanical strength of graphene also provides an opportunity to apply it as a flexible electrode in wearable electronic devices. At the early stage of the development, TCE films that were produced only with graphene or graphene oxide (GO) were mainly reported. However, since then, the hybrid structure of graphene or GO mixed with other TCE materials has been investigated to further improve TCE performance by complementing the shortcomings of each material. This review provides a summary of the fabrication technology and the performance of various TCE films prepared with graphene-related materials, including graphene that is grown by chemical vapor deposition (CVD) and GO or reduced GO (rGO) dispersed solution and their composite with other TCE materials, such as carbon nanotubes, metal nanowires, and other conductive organic/inorganic material. Finally, several representative applications of the graphene-based TCE films are introduced, including solar cells, organic light-emitting diodes (OLEDs), and electrochromic devices.
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Rastogi, Sarushi, Vasudha Sharma, Meenal Gupta, Pushpa Singh, Patrizia Bocchetta, and Yogesh Kumar. "Methods of Synthesis and Specific Properties of Graphene Nano Composites for Biomedical and Related Energy Storage Applications." Current Nanoscience 17, no. 4 (August 12, 2021): 572–90. http://dx.doi.org/10.2174/1573413716666210106101124.

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Анотація:
The concept of graphene in a carbon framework has given rise to enormous improvements to the specific properties of materials. Notably, the combination of graphene with polymeric, metallic and ceramic materials has significantly improved mechanical resistance, electrical and thermal conductivity, and thermal stability of the resulting composite material. In this review, we discuss comprehensive literature on graphene-based composite materials for biomedical and related energy storage applications with emphasis to the synthesis techniques and improved properties of the nanocomposite materials due to graphene addition.
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Lavagna, Luca, Giuseppina Meligrana, Claudio Gerbaldi, Alberto Tagliaferro, and Mattia Bartoli. "Graphene and Lithium-Based Battery Electrodes: A Review of Recent Literature." Energies 13, no. 18 (September 17, 2020): 4867. http://dx.doi.org/10.3390/en13184867.

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Анотація:
Graphene is a new generation material, which finds potential and practical applications in a vast range of research areas. It has unrivalled characteristics, chiefly in terms of electronic conductivity, mechanical robustness and large surface area, which allow the attainment of outstanding performances in the material science field. Some unneglectable issues, such as the high cost of production at high quality and corresponding scarce availability in large amounts necessary for mass scale distribution, slow down graphene widespread utilization; however, in the last decade both basic academic and applied industrial materials research have achieved remarkable breakthroughs thanks to the implementation of graphene and related 1D derivatives. In this work, after briefly recalling the main characteristics of graphene, we present an extensive overview of the most recent advances in the development of the Li-ion battery anodes granted by the use of neat and engineered graphene and related 1D materials. Being far from totally exhaustive, due to the immense scientific production in the field yearly, we chiefly focus here on the role of graphene in materials modification for performance enhancement in both half and full lithium-based cells and give some insights on related promising perspectives.
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Liu, Qi, Qun Jie Xu, Jin Chen Fan, Yang Zhou, and Long Long Wang. "A Review of Graphene Supported Electrocatalysts for Direct Methanol Fuel Cells." Advanced Materials Research 1070-1072 (December 2014): 492–96. http://dx.doi.org/10.4028/www.scientific.net/amr.1070-1072.492.

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Анотація:
As a fascinating two-dimensional nanomaterial, graphene is attractive for electrocatalytical application in direct methanol fuel cells due to its unique structure and outstanding physical properties. Graphene and its derivatives have been widely used as a support material to improve electrocatalytical activity of catalyst particles for methanol and ethanol oxidations. In this review, discussion is focused on the graphene supported monometallic and bimetallic nanocrystals hybrid materials for electrocatalysts. Additionally, the nitrogen-doped graphene utilized for promising support material in electrocatalysts was also mentioned. We believe that the article will be useful to researchers interested in graphene-based catalyst and related materials for direct methanol fuel cells and provide the present status of the subject.
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Dubey, Nileshkumar, Ricardo Bentini, Intekhab Islam, Tong Cao, Antonio Helio Castro Neto, and Vinicius Rosa. "Graphene: A Versatile Carbon-Based Material for Bone Tissue Engineering." Stem Cells International 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/804213.

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The development of materials and strategies that can influence stem cell attachment, proliferation, and differentiation towards osteoblasts is of high interest to promote faster healing and reconstructions of large bone defects. Graphene and its derivatives (graphene oxide and reduced graphene oxide) have received increasing attention for biomedical applications as they present remarkable properties such as high surface area, high mechanical strength, and ease of functionalization. These biocompatible carbon-based materials can induce and sustain stem cell growth and differentiation into various lineages. Furthermore, graphene has the ability to promote and enhance osteogenic differentiation making it an interesting material for bone regeneration research. This paper will review the important advances in the ability of graphene and its related forms to induce stem cells differentiation into osteogenic lineages.
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Murthy, H. C. Ananda, Suresh Ghotekar, B. Vinay Kumar, and Arpita Roy. "Graphene: A Multifunctional Nanomaterial with Versatile Applications." Advances in Materials Science and Engineering 2021 (December 24, 2021): 1–8. http://dx.doi.org/10.1155/2021/2418149.

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Анотація:
Graphene is a 2D material of high quality obtained from a single atom with unique electronic properties. Graphene has the potential to improve the efficiency, versatility, and durability of a wide range of materials and their applications, but its commercial exploitation will require further study. Due to its flatness and semiconductivity in addition to its high surface area, high mechanical rigidity, high thermal stability, superior thermal conductivity, and electrical conductivity, good biocompatibility, and easy functionalization, graphene is the best candidate for multifunctional applications which opened up new possibilities for potential devices and systems. Every type of graphene material is found to exhibit different and unique tunable properties. Graphene is the best candidate in making nanocomposite-based electrochemical sensors. Graphene is among the best electronic materials, but synthesizing a single sheet of graphene has received less attention. The objective of this chapter is to bring awareness to readers on the synthesis, properties, and applications of graphene. The limitations of the current knowledge base and prospective research directions related to graphene materials have also been illustrated.
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Zh. Zhumabekov. ""IMPROVING THE ELECTROPHYSICAL PROPERTIES OF NANOCOMPOSITE MATERIALS BASED ON GRAPHENE OXIDE AND TIO2"." Bulletin of Toraighyrov University. Physics & Mathematics series, no. 3.2022 (September 30, 2022): 66–78. http://dx.doi.org/10.48081/ubfy3179.

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"This article shows the results related to the study of the effect of graphene oxide on the photoelectric properties of nanostructured titanium dioxide films. A TiO2–GO nanocomposite material with a graphene oxide concentration of 3 wt% was synthesized by hydrothermal method. The Raman and IR spectra of nanocomposite materials have been studied and show the presence of peaks characteristic of graphene oxide and titanium dioxide. In the IR spectra, the so-called Ti-O-C bond is observed, which is responsible for fluctuations between TiO2 and graphene oxide. Studies of absorption spectra show that in a nanocomposite material, the absorption spectrum is shifted to the long-wavelength region of light. Studies of electrophysical properties were carried out using electrochemical impedance spectroscopy. The impedance spectrum of this material shows that there is an improvement when graphene oxide is added to TiO2 films. Photovoltaic parameters also show an increase in the photoinduced current in a nanocomposite material with the addition of graphene oxide by 3 wt%. It is shown that when graphene oxide is added 3 wt% to TiO2, an increase in photocatalytic properties is observed due to an increase in the photoinduced current of the nanocomposite material. "
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Більше джерел

Дисертації з теми "Graphene-related material"

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Zhou, Ruiping. "Structural And Electronic Properties of Two-Dimensional Silicene, Graphene, and Related Structures." Wright State University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wright1341867892.

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Mapasha, Refilwe Edwin. "Theoretical studies of graphene and graphene-related materials involving carbon and silicon." Diss., University of Pretoria, 2011. http://hdl.handle.net/2263/25924.

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The structural and electronic properties of graphene and graphene-related materials have been intensively investigated using the plane wave based periodic density func- tional theory (DFT). The Vienna ab initio simulation package (VASP) code employing the generalized gradient approximation (GGA) for the exchange correlation potential was used. In all calculations, the geometry optimization option was employed in allow- ing the structure to fully relax. Hydrogen adatoms were adsorbed on C, Si and SiC in the graphene structure in-volving (1x1),(2x2),(3x3) and (4x4) two dimensional unit cells. The density of states reveals that the adsorption of 50% hydrogen makes the system metallic but 100% coverage at the on top sites generates a band gap. Our results show that SiC in the graphene structure is a plausible structure with a wide band gap. For adsoption of lithium adatoms, we considered various configurations involving the (1x1), (2x1) and (2x2) two-dimensional unit cells, and we consider the isolated Li dimer on graphene. We consider more detailed configurations than have been studied before, and our results compare favourably with previously calculated results where such results exist. For 100% coverage, we have new results for Li on the on-top site, which suggests a staggered configuration for the lowest energy structure for which the Li adatoms are alternately pushed into and pulled out of the graphene layer. For 50% coverage, Li favours the hollow site. We discovered that a careful relaxation of the system also shows a staggered configuration, a result that has not been investigated before.
Dissertation (MSc)--University of Pretoria, 2011.
Physics
unrestricted
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3

Milana, Silvia. "Light interaction with graphene, related materials and plasmonic nanostructures." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708643.

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Bussy, Cyrill. "Biodegradation of graphene and related materials in tissues in vivo." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/biodegradation-of-graphene-and-related-materials-in-tissues-in-vivo(dfdc4d2b-65f7-4523-89de-35feb474c7f4).html.

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Russo, Paola. "Graphene and related materials: from "scotch tape" to advanced production methods." Doctoral thesis, Università di Catania, 2014. http://hdl.handle.net/10761/1500.

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The main topic of this thesis is the synthesis and characterization of carbon-based nanomaterials. In particular, during the first year of my PhD, I focused my attention on the synthesis of graphene, a carbon-based nanomaterial arranged in a two-dimensional (2D) crystal structure. The main purpose of the study was to optimize the method of synthesis of graphene, using the Scotch-tape technique, to obtain greater amounts of graphene compared to samples consisting of several layers. Although this technique leads to high quality graphene sheets, it is not the suitable approach to obtain a gram-scale production of graphene for its employment in nanoelectronics. During the second year, my studies focused on the synthesis and characterization of graphene-based nanomaterials. In particular, I have dealt with graphene nanowalls (GNWs), which consist of few graphene layers vertically oriented on a suitable substrate. These materials have attracted the interest of many researchers due to their potential applications as cathode materials for field emission devices. The last year of my PhD, I studied the effects of ablation of a graphite target either with a nanosecond or a femtosecond laser, in liquids. It was found that the laser ablation of graphite can lead to the synthesis of large graphene domains employing the nanosecond laser, while the use of a femtosecond laser produces large amounts of porous graphene sheets, that are recovered at the water-air interface and the graphene quantum dots that are dispersed in the liquid.
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Huang, Nathaniel Jian. "Magnetotransport in graphene and related two-dimensional systems." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:4944f2d4-83e5-44ee-90f5-faa35acac80f.

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Анотація:
This thesis describes studies on two-dimensional electron gases (2DEG) in graphene and related 2D systems. Magnetotransport investigations specifically in graphene and its bilayer system are demonstrated in detail, while the experimental techniques presented in this thesis are widely applicable to a large variety of other 2D materials. Chapter 1 gives an introduction and motivation for the principal topic presented in this thesis, with a general introduction to carbon nano-materials and an overview of the current state of graphene-related research and technological development (RTD). Chapter 2 establishes a basic theoretical framework which is essential for interpreting the results presented in this thesis, starting with the crystal and electronic band structures of graphene and its bilayer, followed by high magnetic fields effects on transport properties in these 2D systems. Chapter 3 details the experimental methods directly related to the presented work. The next three chapters report experimental results of three specific magnetotransport studies. Chapter 4 reports the disorder effects on epitaxial graphene in the vicinity of the Dirac point. Quadratic increases of carrier densities with temperature are found to be due to intrinsic thermal excitation combined with electron-hole puddles induced by charged impurities. It is also shown that the minimum conductivity increases with increasing disorder strength, in good agreement with quantum-mechanical numerical calculations. Chapter 5 reports measurements of the quantum Hall effect in epitaxial graphene showing the widest quantum Hall plateau observed to date extending over 50 T, attributed to a magnetic field dependent charge transfer process from charge reservoirs with exceptionally high densities of states in close proximity to the graphene. Using a realistic framework of broadened Landau levels this process is modelled in excellent agreement with experimental results. In Chapter 6, energy relaxation of hot carriers in graphene bilayer systems is investigated from measurements on Shubnikovde Haas oscillations and weak localisation. The hot-electron energy loss rate follows the predicted T4 power-law at carrier temperatures from 1.4 up to about 100 K, due to electron-acoustic phonon interactions. Comparisons are made between graphene monolayer and bilayer systems and a much stronger carrier density dependence of the energy loss rate is found in the bilayer system. This thesis concludes with a summary of the most important findings of the topics that have been discussed. The significance and limitations of the present research are listed. Some suggestions and outlook are given for possible improvements and interesting areas of future research and development.
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Guidetti, Gloria <1990&gt. "Smart surfaces for environmental remediation. Highly efficient photocatalytic nanocomposites incorporating metal oxides and graphene related materials." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8572/1/TESI_Dott_GloriaGuidetti.pdf.

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After the Kyoto Protocol, the World Health Organization estimated in2016 that up to date one out of every nine deaths was related to outdoor/indoor air pollution[1]. As a consequence the World’s population expressed the need to have Healthier Cities and the design of new technologies to eliminate air pollutants[e.g. nitrogen oxides(NOx)and organics] by using natural sunlight, and their integration into smart cities became the centre of an ever increasing research[2]. Photocatalysts based on TiO2 are already on the market[3] and embedded in commercial products, such as cement[4]. However, they work only with the UV light λ<380nm [5], with a significant drop of performance in the visible[6]. In this work I enhanced and extend the TiO2 spectral activity by creating hybrid photocatalysts with organics (e.g perylenes), or graphene and related materials (GRM-PCs)(e.g. graphene, MoS2, WS2 and red phosphorous (RP)). We test the photocatalytic activity by monitoring the dye degradation(rhodamineB,(RhB))caused by GRM-PCs after a fixed irradiation time with respect to pristine TiO2. GRM-PCs based on TiO2 mixed with exfoliated graphite (TiO2-Gr) or with RP show ~90% higher photocatalytic activity, in terms of dye degradation, than pristine TiO2, after 20 min UV-Vis irradiation. Tests in the visible range (400<λ<800nm) how that RP is ideal for indoor applications, with a~800%improvement of photocatalytic activity with respect to TiO2, after 40min vis-light irradiation (5mW/cm2). The photocatalytic activity of TiO2-Gr is tested after mixing in an industrial concrete matrix, resulting in an increment of dye degradation of50%. These data underpin the potential of GRM-PCs for smart surfaces. In a city such as Milan, covering 15% of urban surfaces with TiO2-based cement photocatalysts would enable a reduction in pollution~50%. An efficient dispersion of the new cementitious coatings I have developed will allow to reach an abatement of the pollution of90% with2.5% surface covering. [1]http://www.who.int.[2]H.Tong,Adv.Mater,24,229(2012)[3]http://www.ti-line.net/[4]http://www.italcementigroup.com/ITA/[5]M.R.Hoffmann,Chem.Rev.,95,69(1995)[6]R.Asahi,Science,293,269,(2001)
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8

Vacacela, Gomez Cristian Isaac, Pietro Pantano, and Antonio Sindona. "Plasmon phenomena in graphene-related and beyond-graphene materials: a time-dependent density functional theory approach.Plasmon phenomena in graphene-related and beyond-graphene materials: a time-dependent density functional theory approach." Thesis, 2017. http://hdl.handle.net/10955/1306.

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Chia-WeiChang and 張家維. "Synthesis and Patterning of Graphene Sheets and Related Materials." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/vazs8a.

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Анотація:
博士
國立成功大學
材料科學及工程學系
104
In this research, we fabricate graphene oxide sheets and directly exfoliated few-layer graphene sheets by Hummer’s method and liquid-phase exfoliation process, respectively. Then we define patterns of graphene and graphene related materials by nano-imprinting method. We discuss the mechanisms of these experiments. The morphology of directly exfoliated graphene sheets (DEGS) was greater than 20 μm on the longer side. The number of layers is less than five. No surfactant was added, and only low boiling point solvents and ionic chemicals were used. Big-sized natural graphite flakes was used as the raw material and ethanol and ammonia were used as solvents, then ultrasound was applied to help direct exfoliation in a bath. The direct exfoliation mechanism for preparing large-area graphene sheets is proposed and discussed. The concentration of large-area DEGS suspension is up to 18~20 μg/mL. We use all-aqueous method to pattern solution-processed graphene oxide (GO). We take advantage of the naturally charged property of GO to pattern it on the substrates which were pre-soaked in polyethyleneimine (PEI) solution. The charged GO was spin-coated on the polydimethylsiloxane (PDMS) stamp to achieve maskless patterning by a transfer printing method. The feature sizes of the printed GO patterns obtained ranging from 20 to 90 μm. We also discuss the mechanisms of the transfer process, which are dependent on the different strengths of nonspecific adhesion at the interface between the PDMS-GO sheets and substrate-GO sheets, as well as the electrostatic interaction between charged functional groups on GO and PEI molecules.
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Tubon, Usca Gabriela Viviana, Pietro Pantano, Adalgisa Tavolaro, and Lorenzo Caputi. "Physical and Chemical treatments to produce graphene and their related applications." Thesis, 2016. http://hdl.handle.net/10955/1377.

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Анотація:
Doctoral school ""Archimede" in Science Communication and Technology, Ciclo XXVIII SSD FIS/01a.a. 2015-2016
In this work Few Layers Graphene (FLG) and Graphene Oxide (GO) were produced by using physical and chemical treatments, and two types of applications were tested with GO. The first application concerns the Drug delivery in the field of nano-medical treatments, while the second regards environmental remediation for removal of pollutants from water. Few Layers Graphene (FLG) was produced from natural graphite by two methods: i) Sonication in a mixture of solvents, and ii) With the aid of an external agent (zeolite crystals) in the exfoliation process. In the first stage, the mixture was made with two types of solvents: N-methyl-2 pyrrolidone and Dimethylsulfoxide in different ratios. The exfoliation was carried out in that mixtures, then the centrifugation was applied in order to remove unexfoliated graphite. The supernatant suspensions were characterized using Ultraviolet - visible spectroscopy (UV-vis), and Raman Spectroscopy. The Uv-visible analysis and the Raman spectroscopy showed of existence of Few layers Graphene (FLG). In the second stage, the zeolite 4A (Z4A) was selected. The experiments were carried out to improve the exfoliation of graphite, after the exfoliation and centrifugation; the stability was achieved in those that were added the zeolite 4A. Supernatant solutions were characterized by Field Emission Scanning Electron Microscopy (FESEM), Transmission Electron Microscopy (TEM), Electron Diffration, and Raman Spectroscopy. The 3_BS suspension and the 7_F suspension showed the best results; these reached the greatest amount of days in suspension. The Electrical Characterization (EC) was carried out using 3_BS and 7_F suspensions. The drop-casting technique was used over Al2O3 substrates with gold (Au) InterDigitated Electrodes (IDE). The Current–Voltage (I-V) characterization was performed, and the results were averaged for each sample and computed; in order to obtain the 2D resistivity (ρ2D). Finally, an annealing treatment was applied on the Al2O3/Au substrates; afterwards, the resistivity improves, for 3_BS ink by a factor of 1.75 and for the 7_F ink by a factor of 1.3. Graphene Oxide was produced from natural graphite flakes. A chemical treatment was applied in order to produce graphene oxide through the Hummer’s method and Improved Hummer’s method. At the end of the process, the graphene oxide was recovered under form of colloidal suspensions. The characterization was made by Field Emission Scanning Electron Microscopy (FESEM), Ultraviolet–visible (UV-vis) spectroscopy, Fourier Transform Infrared spectroscopy (FTIR), Energy Dispersive Spectroscopy (EDS), and Raman Spectroscopy. The results showed a good level of oxidation in the material and small flakes of graphene oxide. Concerning to the adsorption process for drug delivery, a cancer drug was used. Doxorubicin (DOX) hydrochloride was placed in contact with GO to evaluate the capacity of adsorption of the material using the depletion method. The study was carried out by using different initial concentrations of DOX and different pH values. All experiments were placed under agitation in dark conditions at room temperature and different incubation times. Once the results of final concentrations was completed, the quantity loaded onto GO were calculated. Finally, the kinetic adsorption showed a percentage of 95% at pH 3 in only 24 hours of interaction. The GO presented excellent characteristics to be used in nano-medical applications. Regarding environmental applications, an adsorption study was conducted using commercial Acridine Orange dye (AO). The adsorption process was proved using the depletion method. AO was prepared in aqueous solution at different concentrations, and these were placed under agitation and dark conditions at different contact times to evaluate the kinetic adsorption. The GO was analyzed at different weight using the highest concentration of AO. On the other hand, the temperature and the incubation time were varied, to find out the best conditions for the adsorption process. The kinetic of adsorption showed a percentage of adsorption among 75% to 95% in the first 20 min for higher concentrations and GO showed a better adsorption process to higher temperatures
University of Calabria
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Книги з теми "Graphene-related material"

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Ng, Leonard W. T., Guohua Hu, Richard C. T. Howe, Xiaoxi Zhu, Zongyin Yang, Christopher G. Jones, and Tawfique Hasan. Printing of Graphene and Related 2D Materials. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-91572-2.

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2

Jorio, A. Raman spectroscopy in graphene related systems. Weinheim, Germany: Wiley-VCH, 2011.

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3

Bondavalli, Paolo. Graphene and Related Nanomaterials: Properties and Applications. Elsevier Science & Technology Books, 2017.

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4

Bondavalli, Paolo. Graphene and Related Nanomaterials: Properties and Applications. Elsevier Science & Technology Books, 2017.

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5

Qi, Xiang, Zongyu Huang, and Jianxin Zhong. 2D Monoelemental Materials and Related Technologies: Beyond Graphene. Taylor & Francis Group, 2022.

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Qi, Xiang, Zongyu Huang, and Jianxin Zhong. 2D Monoelemental Materials and Related Technologies: Beyond Graphene. CRC Press LLC, 2022.

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Qi, Xiang, Zongyu Huang, and Jianxin Zhong. 2D Monoelemental Materials and Related Technologies: Beyond Graphene. Taylor & Francis Group, 2022.

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Qi, Xiang, Zongyu Huang, and Jianxin Zhong. 2D Monoelemental Materials and Related Technologies: Beyond Graphene. Taylor & Francis Group, 2022.

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Jones, Christopher G., Guohua Hu, Leonard W. T. Ng, Richard C. T. Howe, Xiaoxi Zhu, Zongyin Yang, and Tawfique Hasan. Printing of Graphene and Related 2D Materials: Technology, Formulation and Applications. Springer, 2018.

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Hu, Guohua, Leonard W. T. Ng, Richard C. T. Howe, Xiaoxi Zhu, and Zongyin Yang. Printing of Graphene and Related 2D Materials: Technology, Formulation and Applications. Springer International Publishing AG, 2018.

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Частини книг з теми "Graphene-related material"

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Ng, Leonard W. T., Guohua Hu, Richard C. T. Howe, Xiaoxi Zhu, Zongyin Yang, Christopher G. Jones, and Tawfique Hasan. "2D Material Production Methods." In Printing of Graphene and Related 2D Materials, 53–101. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91572-2_3.

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Mandal, Manas, Anirban Maitra, Tanya Das, and Chapal Kumar Das. "Graphene and Related Two-Dimensional Materials." In Graphene Materials, 1–23. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2015. http://dx.doi.org/10.1002/9781119131816.ch1.

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Ng, Leonard W. T., Guohua Hu, Richard C. T. Howe, Xiaoxi Zhu, Zongyin Yang, Christopher G. Jones, and Tawfique Hasan. "Applications of Printed 2D Materials." In Printing of Graphene and Related 2D Materials, 179–216. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91572-2_6.

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Gopalakrishnan, Kothandam, Achutharao Govindaraj, and C. N. R. Rao. "Supercapacitors Based on Graphene and Related Materials." In Nanocarbons for Advanced Energy Storage, 227–52. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2015. http://dx.doi.org/10.1002/9783527680054.ch8.

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Ng, Leonard W. T., Guohua Hu, Richard C. T. Howe, Xiaoxi Zhu, Zongyin Yang, Christopher G. Jones, and Tawfique Hasan. "Structures, Properties and Applications of 2D Materials." In Printing of Graphene and Related 2D Materials, 19–51. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91572-2_2.

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Rogalski, Antoni. "Relevant Properties of Graphene and Related 2D Materials." In 2D Materials for Infrared and Terahertz Detectors, 121–40. First edition. | Boca Raton, FL : CRC Press, Taylor & Francis Group, 2020. |: CRC Press, 2020. http://dx.doi.org/10.1201/9781003043751-5.

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Ng, Leonard W. T., Guohua Hu, Richard C. T. Howe, Xiaoxi Zhu, Zongyin Yang, Christopher G. Jones, and Tawfique Hasan. "Introduction." In Printing of Graphene and Related 2D Materials, 1–17. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91572-2_1.

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Ng, Leonard W. T., Guohua Hu, Richard C. T. Howe, Xiaoxi Zhu, Zongyin Yang, Christopher G. Jones, and Tawfique Hasan. "2D Ink Design." In Printing of Graphene and Related 2D Materials, 103–34. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91572-2_4.

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Ng, Leonard W. T., Guohua Hu, Richard C. T. Howe, Xiaoxi Zhu, Zongyin Yang, Christopher G. Jones, and Tawfique Hasan. "Printing Technologies." In Printing of Graphene and Related 2D Materials, 135–78. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91572-2_5.

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Kumar, Prashant, Barun Das, Basant Chitara, K. S. Subrahmanyam, H. S. S. Ramakrishna Matte, Urmimala Maitra, K. Gopalakrishnan, S. B. Krupanidhi, and C. N. R. Rao. "Novel Radiation-Induced Properties of Graphene and Related Materials." In Chemical Synthesis and Applications of Graphene and Carbon Materials, 159–89. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2016. http://dx.doi.org/10.1002/9783527648160.ch8.

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Тези доповідей конференцій з теми "Graphene-related material"

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Lee, Seung Won, Hyoung Tae Kim, and In Cheol Bang. "Performance Evaluation of a High Thermal Conductivity Fuel With Graphene Additives During the LBLOCA." In 2012 20th International Conference on Nuclear Engineering and the ASME 2012 Power Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/icone20-power2012-55206.

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Анотація:
The fuel rod performance of enhanced thermal conductivity UO2/graphene composites is investigated through a LBLOCA analysis. The benefits increased monotonically with increasing thermal conductivity in terms of reduced fuel center temperature and PCT. The performance of the UO2/graphene composite fuel is assessed in OPR-1000 (Optimized Power Reactor-1000) during a LBLOCA. Graphene can be a promising material for developing advanced nuclear fuel because of its property about the high thermal conductivity and low absorption cross section. The results confirm a LBLOCA performance related to PCT of the UO2/graphene composite fuel and its potential while maintaining large safety margins.
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Zhang, Feng, Feng Yang, Dong Lin, and Chi Zhou. "Parameter Study on 3D-Printing Graphene Oxidize Based on Directional Freezing." In ASME 2016 11th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/msec2016-8846.

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Graphene is one of the most promising carbon nanomaterial due to its excellent electrical, thermal, optical and mechanical properties. However, it is still very challenging to unlock its exotic properties and widely adopt it in real-world applications. In this paper, we introduces a new 3D graphene structure printing approach with pure graphene oxide material, better inter-layer bonding, and complex architecture printing capability. Various parameters related to this novel process are discussed in detail in order to improve the printability, reliability and accuracy. We have shown that the print quality largely depends on the duty cycle of print head, applied pressure and travel velocity during printing. A palette of printed samples are presented to demonstrate the effectiveness of the proposed technique along with the optimal parameter settings. The proposed process proves to be a promising 3D printing technique for fabricating multi-scale nanomaterial structures. The theory revealed and parameters investigated herein are expected to significantly advance the knowledge and understanding of the fundamental mechanism of the proposed directional freezing based 3D nano printing process. Furthermore the outcome of this research has the potential to open up a new avenue for fabricating multi-functional nanomaterial objects.
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Paulillo, Bruno, Nestor Jr Bareza, Irene Dolado, Marta Autore, Kavitha K. Gopalan, Rose Alani, Rainer Hillenbrand, and Valerio Pruneri. "Plasmonic mid-IR gas sensing using graphene and related materials." In Smart Photonic and Optoelectronic Integrated Circuits XXIII, edited by Sailing He and Laurent Vivien. SPIE, 2021. http://dx.doi.org/10.1117/12.2577468.

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Fiori, Gianluca. "On the Perspectives of Graphene and Related Materials for Nanoelectronics Applications." In nanoGe Fall Meeting 2019. València: Fundació Scito, 2019. http://dx.doi.org/10.29363/nanoge.ngfm.2019.316.

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Fiori, Gianluca. "On the Perspectives of Graphene and Related Materials for Nanoelectronics Applications." In nanoGe Fall Meeting 2019. València: Fundació Scito, 2019. http://dx.doi.org/10.29363/nanoge.nfm.2019.316.

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Agresti, A., S. Pescetelli, L. Najafi, A. E. Del Rio Castillo, R. Oropesa-Nunez, Y. Busby, F. Bonaccorso, and A. Di Carlo. "Graphene and related 2D materials for high efficient and stable perovskite solar cells." In 2017 IEEE 17th International Conference on Nanotechnology (IEEE-NANO). IEEE, 2017. http://dx.doi.org/10.1109/nano.2017.8117278.

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Roy, Samit, and Avinash Akepati. "Multi-Scale Modeling of Fracture Properties for Nano-Particle Reinforced Polymers Using Atomistic J-Integral." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-36419.

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Анотація:
The nano-scale interaction between polymer molecules and nanoparticle is a key factor in determining the macro-scale strength of the composite. In recent years numerous efforts have been directed towards modeling nanocomposites in order to better understand the reasons behind the enhancement of mechanical properties, even by the slight addition (a few weight percent) of nano-materials. In order to better understand the local influence of nano-particle on the mechanical properties of the composite, it is required to perform nano-scale analysis. In this context, modeling of fracture and damage in nano-graphene reinforced EPON 862 has been discussed in the current paper. Regarding fracture in polymers, the critical value of the J-integral (JI), where the subscript I denotes the fracture mode (I=1, 2, 3), at crack initiation could be used as a suitable metric for estimating the crack driving force as well as fracture toughness of the material as the crack begins to initiate. However, for the conventional macroscale definition of the J-integral to be valid at the nanoscale, in terms of the continuum stress and displacement fields and their spatial derivatives — requires the construction of local continuum fields from discrete atomistic data, and using these data in the conventional contour integral expression for atomistic J-integral. One such methodology is proposed by Hardy that allows for the local averaging necessary to obtain the definition of free energy, deformation gradient, and Piola-Kirchoff stress as fields (and divergence of fields) and not just as total system averages. Further, the atomistic J-integral takes into account the effect of reduction in J from continuum estimates due to the fact that the free energy available for crack propagation is less than the internal energy at sufficiently high temperatures when entropic contributions become significant. In this paper, the proposed methodology is used to compute J-integral using atomistic data obtained from LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator). As a case study, the feasibility of computing the dynamic atomistic J-integral over the MD domain is evaluated for a graphene nano-platelet with a central crack using OPLS (Optimized Potentials for Liquid Simulations) potential. For model verification, the values of atomistic J-integral are compared with results from linear elastic fracture mechanics (LEFM) for isothermal crack initiation at 0 K and 300 K. Computational results related to the path-independence of the atomistic J-Integral are also presented. Further, a novel approach that circumvents the complexities of direct computation of entropic contributions is also discussed. Preliminary results obtained from the bond-order based ReaxFF potential for 0.1 K and 300 K are presented, and show good agreement with the predictions.
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Pescetelli, S., A. Agresti, A. Di Carlo, F. Bonaccorso, and Y. Busby. "Graphene and Related 2D Materials: A Winning Strategy for Enhanced Efficiency and Stability in Perovskite Photovoltaics." In 2018 IEEE 4th International Forum on Research and Technology for Society and Industry (RTSI). IEEE, 2018. http://dx.doi.org/10.1109/rtsi.2018.8548350.

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Li, Xiaobo, Jun Liu, and Ronggui Yang. "Tuning Thermal Conductivity With Mechanical Strain." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-23334.

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Анотація:
Mechanical strain provides an efficient way for tuning thermal conductivity of materials. In this study, molecular dynamics (MD) simulation is performed to systematically study the strain effects on the lattice thermal conductivity of silicon and carbon based materials (mainly nanostructures: Si nanowire and thin film, single-walled carbon naotube (SWCNT) and single layer graphene) and bulk polymer materials. Results show that thermal conductivity of the strained silicon nanowires and thin films decreases continuously when the strain changes from compressive to tensile. However, the thermal conductivity has a peak value under compressive strain for SWCNT and at zero strain for single layer graphene. In contrast, thermal conductivity of polymer materials increases with increasing tensile strain. The underlying mechanisms are analyzed in this paper for both types of materials. We found that the thermal conductivity of silicon and carbon based materials can be related to the phonon dispersion curve shift and structural buckling under strain and for polymer chains thermal conductivity directly connects to the orientations of the chains. This thermal conductivity dependence with strain can guide us to tune the thermal conductivity for materials in applications.
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Oviroh, Peter Ozaveshe, Sunday Temitope Oyinbo, Sina Karimzadeh, and Tien-Chien Jen. "Multilayer Separation Effects on MoS2 Membranes in Water Desalination." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-69156.

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Abstract Climate change and its related effects are imposing severe stress on the current freshwater supplies. This has been exacerbated due to the growth in population, rapid industrialization, and increased energy demand. Increased water requirement is a global challenge. Although more than 70% of the Earth is covered by water, much of it is unusable for human use. Freshwater reservoirs, ponds, and subterranean aquifers account for just 2.5% of the world’s overall freshwater availability. Unfortunately, these water supplies are not very unevenly spread. Therefore, the need to augment these supplies through the desalination of seawater or brackish water. Reverse osmosis (RO) is currently the most widespread method of desalination. However, the unit cost of water is still high partly due to the thin-film composite (TFC) polymer membranes used in the current desalination system. Thus the need for low-cost nanomaterials for Water Desalination and Purification. A promising way to meet this demand is to use two-dimensional (2D) nanoporous materials such as graphene and MoS2 to minimize energy consumption during the desalination process. New nanotechnology methodologies that apply reverse osmosis have been developed. Among some of these technologies is using 2D materials such as graphene and MoS2, which have been studied extensively for water desalination. Single-layer nanoporous 2D materials such as graphene and MoS2 promises better filtrations in the water channel. Although single-layer MoS2 (SL_MoS2) membrane have much promise in the RO desalination membrane, multilayer MoS2 are simpler to make and more cost-efficient. Building on the SL_MoS2 membrane knowledge, we have used the molecular dynamics method (MD) to explore the effects of multilayer MoS2 in water desalination. This comparison is made as a function of the pore size, water flow rate and salt rejection. In addition, we also looked at the effect of the increased interlayer spacing between layers of the nanoporous 2D membrane and then made the comparison. The ions rejection follows the trend trilayer&gt; bilayer&gt; monolayer from results obtained, averaging over all three membrane types studied for the MoS2, the ions rejection follows the trend trilayer &gt; bilayer &gt; monolayer. We find that the thin, narrow layer separation plays a vital role in the successful rejection of salt ions in bilayers and trilayers membranes. These findings will help build and proliferate tunable nanodevices for filtration and other applications.
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Звіти організацій з теми "Graphene-related material"

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Barkan, Terrance. The Role of Graphene in Achieving e-Mobility in Aerospace Applications. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, December 2022. http://dx.doi.org/10.4271/epr2022030.

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<div class="section abstract"><div class="htmlview paragraph">Advanced two-dimensional (2D) materials discovered in the last two decades are now being produced at scale and are contributing to a wide range of performance enhancements in engineering applications. The most well-known of these novel materials is graphene, a nearly transparent nanomaterial comprising a single layer of bonded carbon atoms. In relative terms, it has the highest level of heat and electrical conductivity, protects against ultraviolet rays, and is strongest material ever measured. These properties have made graphene an attractive potential material for a variety of applications, particularly for transportation related uses, and especially for aerospace engineering. </div><div class="htmlview paragraph"><b>The Role of Graphene in Achieving e-Mobility in Aerospace Applications</b> reviews the current state of graphene-related aerospace applications and identifies the technological challenges facing engineers that look to benefit from graphene’s attractive properties.</div><div class="htmlview paragraph"><a href="https://www.sae.org/publications/edge-research-reports" target="_blank">Click here to access the full SAE EDGE</a><sup>TM</sup><a href="https://www.sae.org/publications/edge-research-reports" target="_blank"> Research Report portfolio.</a></div></div>
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Creager, Stephen. Hydrogen isotope fractionation using graphene and related 2-D materials (Final Report). Office of Scientific and Technical Information (OSTI), February 2021. http://dx.doi.org/10.2172/1766950.

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Despotelis, K., A. Pollard, C. Clifford, and K. Paton. VAMAS TWA 41 - Graphene and related 2D materials project 12 - Distribution of lateral size and thickness of few-layer graphene flakes using SEM and AFM. SEM and AFM measurement protocol. National Physical Laboratory, February 2023. http://dx.doi.org/10.47120/npl.as103.

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